19717940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89627}}^1$

素因数の和:89647

約数の個数: 24

約数和(自身を含む): 45172512

約数和(自身を除く): 25454572

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 89627, 179254, 358508, 448135, 896270, 985897, 1792540, 1971794, 3943588, 4929485, 9858970, 19717940]

約数ペア:

[(1, 19717940), (2, 9858970), (4, 4929485), (5, 3943588), (10, 1971794), (11, 1792540), (20, 985897), (22, 896270), (44, 448135), (55, 358508), (110, 179254), (220, 89627)]